Arias et al present a sediment core record from a maar in the Eifel volcano field in central Germany that securely dates the Elsterian glaciation to MIS 12, and the Holsteinian interglacial to MIS 11. Based on the tephra dates and annual layer counting, they constrain the MIS 11 interglacial optimum to be between 395-421 thousand years ago #PaleoClimate #IceSheets #ClimateChange #SedimentCore #Tephra https://www.sciencedirect.com/science/article/pii/S0921818123001169